Question

Puppies ,kittens fight each other when they see a piece of cloth .they try to tear it off ,why??

Answer 1

because it is In there geans..
it is genetic in cats and dogs...
At their tender age, it is more likely to be a playful tug of war, rather than an actual fight. As with all young, of any animal, play is important in development.

Answer 2

Puppies, kittens fight each other when they see a piece of cloth. They even try to tear it off because the reason is that they both hate each other.  

Explanation:

The dog always chases the cat and vice versa. When they see anything which is liked by both in common, they want to own it somehow. For that they fight with each other in such a way that either they must get or the thing must be not owned by either dog or cat.